Alexander Reelsen

One Hash Bloom Filters Bloom filters prevent going to storage at BlueSky allowing them to scale a lot better. Shows a few nice optimizations to speed things up even further. calabro.io/ohbf

Using Owntracks & Bunny Edge Script + Database for location tracking Wanted to roughly track my movements using my phone. Pointed Owntracks to a custom Bunny edge script, that also renders a UI. Costs a few cents this month. Provisioned via terraform. Took an hour to get up and running

Running a single module scews the measure, too. A big build, where build time matters, will take minutes. Two seconds of them to warm up, maybe, but you will lose two seconds on each forked call to Javac, jar, Javadoc. This cannot work.

Unlikely. With repeated builds, most runtime goes to JVM tooling. If you use Javac via the tools API and keep the VM warm through a daemon, you will outperform Rust by length. Warm Java in itself is hard to beat.

Saluki 27B - open source model that fits in a 16gb laptop based on Qwen3.8-27B. So apparently you can get work done locally on a small laptop now, that 9 months ago was only possible on crazy hardware. So for evening hack projects any subscriptions might be obsolete soon? underdog.ai/saluki

sslx - openssl, but you don't have to google the flags Rust written CLI tool to simplfy grade, verify or inspect certs as well as creating them. github.com/glincker/sslx

enroute - git object storage on S3 "Code hosting is the last piece of the software stack still stuck in SaaS.". Rewriting git so it fits perfectly on object storage is a good idea to probably get bought by GitHub or Gitlab very quick... enroute.sh/blog/everyon...

Radix colors - A gorgeous, accessible color system for user interfaces So helpful for folks like me who are just not good at designing UIs to create a custom palette of colors. www.radix-ui.com/colors

pyronaut - A high-performance Python framework Written in Micronaut and GraalVM, claims to be much faster than other frameworks. Seems also to be written and maintained by folks working at Oracle. pyronaut.io

rowing-machine - Fast + flexible simulated data generator with configurable themes. Written in Rust, has three scenarios (ecommerce, saas, travel), generates csv, jsonl or parquet data, plus optional compression. github.com/gwenwindflow...

portop - htop for your ports Another TUI for checking which processes are listening on which ports. And optionally kill them. github.com/padovanl/por...

tsuzuri - TUI markdown notebook vim style editing, diagrams, kanban board, calendar, all within a single TUI, let's see if it is worth replacing silverbullet - switching has never been easier in the times of markdown. github.com/jaisuriya-11...

jeyzma - run System One models, 100% local in browser Written in Go and compiled with TinyGo to wasm. Crazy how quick this kind of models became local first. github.com/hybridgroup/...

ZXC: Lossless compression built for ultra-fast decode Faster decoding than lz4 by spending extra time upfront in encoding. Bindings in rust, python, node, go and wasm so far. libzxc.org

OpenTelemetry SDK overhead Comparing the different programming languages and their SDK overhead. Python not faring well, interesting to see that sampling lowers the cost but never removes, including Java and C++. docs.coroot.com/tracing/open...

Finished: Spec driven development Now specs are written for the agents, but also version controlled. This book shows a way of doing it. Hoped for more infos to integrate in existing workflows. Still need to dig into openspec, spec-kit for that I guess Huge font, 150 pages, 29 EUR for the softcover

jrs - a JVM build system written in Rust Like jenesis, just for single module setups, but the simplicity looks nice. Also interesting to see Rust taking over tooling. Supports pinning, docs, showing outdated dependencies and many more. getjrs.dev

TIL you can use mise to bootstrap your macos defaults (hiding the dock, keyboard repeat rate, finder defaults). I usually use some shell scripts in my dotfiles repo - this looks much cleaner and more extensive. mise.jdx.dev/bootstrap.html

Ingestr - CLI that allows you to ingest data from any source into any destination Not just for databases, but also many platforms like HR platforms or social media analytics, chess or soccer data. getbruin.com/docs/ingestr/

Finished: Code to cashflow German book, explains the different steps from permanent employee to freelancer to business owner to investor as a path to financial freedom and autonomy. Very short and informative written, however not sure where the AI part really is, except on the cover :-)

Lakebase Search: State-of-the-art full text and vector search for Postgres Postgres based FTS/vector search content this week, so let's finish the week with that as well. Quite a few solutions for search in postgres, time for a settlement/selection phase next. www.databricks.com/blog/lakebas...

Long read/interview with Tom Lane about 30 years of Postgres. Covers scalability, threads, MVCC, query planning vacuuming and many other things. It's always so good to have folks who have worked years on the same piece of software and share the history. www.snowflake.com/en/blog/engi...

Luxir - a new search engine From the inventor of Solr, written in C++, not clustered for now, uses gRPC, supports streaming import, vector search & hybrid search. Lots of similar terminology with Lucene/Solr/Elasticsearch, so reading the docs will be quite easy. luxir.org

Finished: Architecting Agentic Solutions with Claude Should help with the first claude certification, however was released 6 months ago, not sure, how up-to-date it is with regards to that. Covers the most high level getting started parts, but not much more.

Principles of Memory Management in Java Nice introduction, but also some hints why benchmarks that solely focus on throughput/memory might need to be rethought. www.youtube.com/watch?v=xr73...

Announcing blob-stream: a Kafka alternative for no fuss, low cost high volume streaming Interesting post, showing a 10x cost reduction, while maintaining the required feature set for their use-case. The Kafka protocol has become a redis like grail of compatibility. blog.bitdrift.io/post/blob-st...

The videos of Haystack Europe 2026 are already uploaded. I haven't dug into them yet. Any recommendations or must watch ones? The one about sparse encoders I will watch for sure. www.youtube.com/playlist?lis...

fastlogging - Fast logging module written in Rust Integrates with python, C, C++, Go, Java & C#. I have not really understood the benchmarks against log4j/log4j2, so I am not sure it's really faster. github.com/brmmm3/fastl...

Benchmarking Java Performance Of JDK 8 Through OpenJDK 27 TLDR; Upgrade your Java, more performance, less hardware needed. www.phoronix.com/review/java-...

As I am spending too much time on the couch right now, I watched the Java documentary. Great to see many known faces who have been strong in the Java community for years. And if you look closely at 1:05:54 you will also spot an Elastic logo 😀 www.youtube.com/watch?v=ZqGS...

Just-In-Time Compilation for Java Performance: Recent and Ongoing Improvements Great talk about recent improvements... aka performance for free if you upgrade your JDK. www.youtube.com/watch?v=h45c...

Adaptive Lossless Floating-Point Encoding in Apache Parquet Now part of the parquet format. Great to see that there is also an implementation status page, so. you can check each library for its status regarding newer features. parquet.apache.org/blog/2026/09...

ZGC improvements continue until big users adapt JEP 546 shows adaptive heap sizing, JEP 545 is about faster startup and warmup with ZGC. Good to see so many ongoing improvements. openjdk.org/jeps/546

Lakebase: Serverless Postgres over Open Lake Storage "supports in-place vertical scaling of CPU, memory, and disk without VM restart." The NeonVM autoscaling parts are interesting, with the acquisition open development has stopped. www.vldb.org/pvldb/vol19/...

Archify - technical diagrams from plain english Another LLM to diagram tool, this time creating fully self sustained HTML, including motion for step-by-step explanations. tt-a1i.github.io/archify/

eraser-diagrams - JSON based diagramming JSON for structure, CSS for formatting, so not really human-readable. I think I'd go with DSL as diagram for now, but let's see how things change or if this is the way to go for more fancy presentations. github.com/eraserlabs/e...

RAGE4J - RAG Evaluations for Java a Java toolkit for evaluating LLM outputs and using unit tests/assertions for evaluation. rage4j.dev

Dashdown - Use Markdown & SQL to create dashboards Uses tailwind, allows to create own components, realtime updates, has a dozen connectors. Used CSV solar data to try. Seems that evidence now has cloud lock-in, so that someone else created an open source alternative in python. dashdown.ai

wal3: A Write-Ahead Log for Chroma, Built on Object Storage Very interesting blog post about a WAL on S3, including checksumming using setsum. www.trychroma.com/engineering/...

bzip3 - A better and stronger spiritual successor to BZip2 compression is also one of those topics (like information retrieval) where folks always it cannot get better, but somehow smart people always have new ideas. github.com/iczelia/bzip3

Google AlloyDB Architecture, Internals and Performance: 2026 Best Practices Guide Extensive blog post to learn about AlloyDB and where it differs from postgres. minervadb.com/alloydb-arch...